ld/ldlex.l

   1 %option nounput
   2
   3 %{
   4
   5 /* Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   6    2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
   7    Free Software Foundation, Inc.
   8    Written by Steve Chamberlain of Cygnus Support.
   9
  10    This file is part of the GNU Binutils.
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 3 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program; if not, write to the Free Software
  24    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  25    MA 02110-1301, USA.  */
  26
  27 #include "bfd.h"
  28 #include "safe-ctype.h"
  29 #include "bfdlink.h"
  30 #include "ld.h"
  31 #include "ldmisc.h"
  32 #include "ldexp.h"
  33 #include "ldlang.h"
  34 #include <ldgram.h>
  35 #include "ldfile.h"
  36 #include "ldlex.h"
  37 #include "ldmain.h"
  38 #include "libiberty.h"
  39
  40 /* The type of top-level parser input.
  41    yylex and yyparse (indirectly) both check this.  */
  42 input_type parser_input;
  43
  44 /* Line number in the current input file.
  45    (FIXME Actually, it doesn't appear to get reset for each file?)  */
  46 unsigned int lineno = 1;
  47
  48 /* The string we are currently lexing, or NULL if we are reading a
  49    file.  */
  50 const char *lex_string = NULL;
  51
  52 /* Support for flex reading from more than one input file (stream).
  53    `include_stack' is flex's input state for each open file;
  54    `file_name_stack' is the file names.  `lineno_stack' is the current
  55    line numbers.
  56
  57    If `include_stack_ptr' is 0, we haven't started reading anything yet.
  58    Otherwise, stack elements 0 through `include_stack_ptr - 1' are valid.  */
  59
  60 #undef YY_INPUT
  61 #define YY_INPUT(buf,result,max_size) result = yy_input (buf, max_size)
  62
  63 #define YY_NO_UNPUT
  64
  65 #define MAX_INCLUDE_DEPTH 10
  66 static YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH];
  67 static const char *file_name_stack[MAX_INCLUDE_DEPTH];
  68 static unsigned int lineno_stack[MAX_INCLUDE_DEPTH];
  69 static unsigned int include_stack_ptr = 0;
  70 static int vers_node_nesting = 0;
  71
  72 static int yy_input (char *, int);
  73 static void comment (void);
  74 static void lex_warn_invalid (char *where, char *what);
  75
  76 /* STATES
  77         EXPRESSION      definitely in an expression
  78         SCRIPT          definitely in a script
  79         BOTH            either EXPRESSION or SCRIPT
  80         DEFSYMEXP       in an argument to -defsym
  81         MRI             in an MRI script
  82         VERS_START      starting a Sun style mapfile
  83         VERS_SCRIPT     a Sun style mapfile
  84         VERS_NODE       a node within a Sun style mapfile
  85 */
  86 #define RTOKEN(x)  {  yylval.token = x; return x; }
  87
  88 /* Some versions of flex want this.  */
  89 #ifndef yywrap
  90 int yywrap (void) { return 1; }
  91 #endif
  92 %}
  93
  94 %a 4000
  95 %o 5000
  96
  97 CMDFILENAMECHAR   [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\-\~]
  98 CMDFILENAMECHAR1  [_a-zA-Z0-9\/\.\\_\+\$\:\[\]\\\,\=\&\!\<\>\~]
  99 FILENAMECHAR1   [_a-zA-Z\/\.\\\$\_\~]
 100 SYMBOLCHARN     [_a-zA-Z\/\.\\\$\_\~0-9]
 101 FILENAMECHAR    [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~]
 102 WILDCHAR        [_a-zA-Z0-9\/\.\-\_\+\=\$\:\[\]\\\,\~\?\*\^\!]
 103 WHITE           [ \t\n\r]+
 104
 105 NOCFILENAMECHAR [_a-zA-Z0-9\/\.\-\_\+\$\:\[\]\\\~]
 106
 107 V_TAG [.$_a-zA-Z][._a-zA-Z0-9]*
 108 V_IDENTIFIER [*?.$_a-zA-Z\[\]\-\!\^\\]([*?.$_a-zA-Z0-9\[\]\-\!\^\\]|::)*
 109
 110 %s SCRIPT
 111 %s EXPRESSION
 112 %s BOTH
 113 %s DEFSYMEXP
 114 %s MRI
 115 %s VERS_START
 116 %s VERS_SCRIPT
 117 %s VERS_NODE
 118 %%
 119
 120   if (parser_input != input_selected)
 121     {
 122       /* The first token of the input determines the initial parser state.  */
 123       input_type t = parser_input;
 124       parser_input = input_selected;
 125       switch (t)
 126         {
 127         case input_script: return INPUT_SCRIPT; break;
 128         case input_mri_script: return INPUT_MRI_SCRIPT; break;
 129         case input_version_script: return INPUT_VERSION_SCRIPT; break;
 130         case input_dynamic_list: return INPUT_DYNAMIC_LIST; break;
 131         case input_defsym: return INPUT_DEFSYM; break;
 132         default: abort ();
 133         }
 134     }
 135
 136 <BOTH,SCRIPT,EXPRESSION,VERS_START,VERS_NODE,VERS_SCRIPT>"/*"   { comment (); }
 137
 138
 139 <DEFSYMEXP>"-"                  { RTOKEN('-');}
 140 <DEFSYMEXP>"+"                  { RTOKEN('+');}
 141 <DEFSYMEXP>{FILENAMECHAR1}{SYMBOLCHARN}*   { yylval.name = xstrdup (yytext); return NAME; }
 142 <DEFSYMEXP>"="                  { RTOKEN('='); }
 143
 144 <MRI,EXPRESSION>"$"([0-9A-Fa-f])+ {
 145                                 yylval.integer = bfd_scan_vma (yytext + 1, 0, 16);
 146                                 yylval.bigint.str = NULL;
 147                                 return INT;
 148                         }
 149
 150 <MRI,EXPRESSION>([0-9A-Fa-f])+(H|h|X|x|B|b|O|o|D|d) {
 151                                    int ibase ;
 152                                    switch (yytext[yyleng - 1]) {
 153                                     case 'X':
 154                                     case 'x':
 155                                     case 'H':
 156                                     case 'h':
 157                                      ibase = 16;
 158                                      break;
 159                                     case 'O':
 160                                     case 'o':
 161                                      ibase = 8;
 162                                      break;
 163                                     case 'B':
 164                                     case 'b':
 165                                      ibase = 2;
 166                                      break;
 167                                     default:
 168                                      ibase = 10;
 169                                    }
 170                                    yylval.integer = bfd_scan_vma (yytext, 0,
 171                                                                   ibase);
 172                                    yylval.bigint.str = NULL;
 173                                    return INT;
 174                                  }
 175 <SCRIPT,DEFSYMEXP,MRI,BOTH,EXPRESSION>((("$"|0[xX])([0-9A-Fa-f])+)|(([0-9])+))(M|K|m|k)? {
 176                                   char *s = yytext;
 177                                   int ibase = 0;
 178
 179                                   if (*s == '$')
 180                                     {
 181                                       ++s;
 182                                       ibase = 16;
 183                                     }
 184                                   yylval.integer = bfd_scan_vma (s, 0, ibase);
 185                                   yylval.bigint.str = NULL;
 186                                   if (yytext[yyleng - 1] == 'M'
 187                                       || yytext[yyleng - 1] == 'm')
 188                                     {
 189                                       yylval.integer *= 1024 * 1024;
 190                                     }
 191                                   else if (yytext[yyleng - 1] == 'K'
 192                                       || yytext[yyleng - 1]=='k')
 193                                     {
 194                                       yylval.integer *= 1024;
 195                                     }
 196                                   else if (yytext[0] == '0'
 197                                            && (yytext[1] == 'x'
 198                                                || yytext[1] == 'X'))
 199                                     {
 200                                       yylval.bigint.str = xstrdup (yytext + 2);
 201                                     }
 202                                   return INT;
 203                                 }
 204 <BOTH,SCRIPT,EXPRESSION,MRI>"]"         { RTOKEN(']');}
 205 <BOTH,SCRIPT,EXPRESSION,MRI>"["         { RTOKEN('[');}
 206 <BOTH,SCRIPT,EXPRESSION,MRI>"<<="       { RTOKEN(LSHIFTEQ);}
 207 <BOTH,SCRIPT,EXPRESSION,MRI>">>="       { RTOKEN(RSHIFTEQ);}
 208 <BOTH,SCRIPT,EXPRESSION,MRI>"||"        { RTOKEN(OROR);}
 209 <BOTH,SCRIPT,EXPRESSION,MRI>"=="        { RTOKEN(EQ);}
 210 <BOTH,SCRIPT,EXPRESSION,MRI>"!="        { RTOKEN(NE);}
 211 <BOTH,SCRIPT,EXPRESSION,MRI>">="        { RTOKEN(GE);}
 212 <BOTH,SCRIPT,EXPRESSION,MRI>"<="        { RTOKEN(LE);}
 213 <BOTH,SCRIPT,EXPRESSION,MRI>"<<"        { RTOKEN(LSHIFT);}
 214 <BOTH,SCRIPT,EXPRESSION,MRI>">>"        { RTOKEN(RSHIFT);}
 215 <BOTH,SCRIPT,EXPRESSION,MRI>"+="        { RTOKEN(PLUSEQ);}
 216 <BOTH,SCRIPT,EXPRESSION,MRI>"-="        { RTOKEN(MINUSEQ);}
 217 <BOTH,SCRIPT,EXPRESSION,MRI>"*="        { RTOKEN(MULTEQ);}
 218 <BOTH,SCRIPT,EXPRESSION,MRI>"/="        { RTOKEN(DIVEQ);}
 219 <BOTH,SCRIPT,EXPRESSION,MRI>"&="        { RTOKEN(ANDEQ);}
 220 <BOTH,SCRIPT,EXPRESSION,MRI>"|="        { RTOKEN(OREQ);}
 221 <BOTH,SCRIPT,EXPRESSION,MRI>"&&"        { RTOKEN(ANDAND);}
 222 <BOTH,SCRIPT,EXPRESSION,MRI>">"         { RTOKEN('>');}
 223 <BOTH,SCRIPT,EXPRESSION,MRI>","         { RTOKEN(',');}
 224 <BOTH,SCRIPT,EXPRESSION,MRI>"&"         { RTOKEN('&');}
 225 <BOTH,SCRIPT,EXPRESSION,MRI>"|"         { RTOKEN('|');}
 226 <BOTH,SCRIPT,EXPRESSION,MRI>"~"         { RTOKEN('~');}
 227 <BOTH,SCRIPT,EXPRESSION,MRI>"!"         { RTOKEN('!');}
 228 <BOTH,SCRIPT,EXPRESSION,MRI>"?"         { RTOKEN('?');}
 229 <BOTH,SCRIPT,EXPRESSION,MRI>"*"         { RTOKEN('*');}
 230 <BOTH,SCRIPT,EXPRESSION,MRI>"+"         { RTOKEN('+');}
 231 <BOTH,SCRIPT,EXPRESSION,MRI>"-"         { RTOKEN('-');}
 232 <BOTH,SCRIPT,EXPRESSION,MRI>"/"         { RTOKEN('/');}
 233 <BOTH,SCRIPT,EXPRESSION,MRI>"%"         { RTOKEN('%');}
 234 <BOTH,SCRIPT,EXPRESSION,MRI>"<"         { RTOKEN('<');}
 235 <BOTH,SCRIPT,EXPRESSION,MRI>"="         { RTOKEN('=');}
 236 <BOTH,SCRIPT,EXPRESSION,MRI>"}"         { RTOKEN('}') ; }
 237 <BOTH,SCRIPT,EXPRESSION,MRI>"{"         { RTOKEN('{'); }
 238 <BOTH,SCRIPT,EXPRESSION,MRI>")"         { RTOKEN(')');}
 239 <BOTH,SCRIPT,EXPRESSION,MRI>"("         { RTOKEN('(');}
 240 <BOTH,SCRIPT,EXPRESSION,MRI>":"         { RTOKEN(':'); }
 241 <BOTH,SCRIPT,EXPRESSION,MRI>";"         { RTOKEN(';');}
 242 <BOTH,SCRIPT>"MEMORY"                   { RTOKEN(MEMORY);}
 243 <BOTH,SCRIPT>"REGION_ALIAS"             { RTOKEN(REGION_ALIAS);}
 244 <BOTH,SCRIPT,EXPRESSION>"ORIGIN"        { RTOKEN(ORIGIN);}
 245 <BOTH,SCRIPT>"VERSION"                  { RTOKEN(VERSIONK);}
 246 <EXPRESSION,BOTH,SCRIPT>"BLOCK"         { RTOKEN(BLOCK);}
 247 <EXPRESSION,BOTH,SCRIPT>"BIND"          { RTOKEN(BIND);}
 248 <BOTH,SCRIPT,EXPRESSION>"LENGTH"        { RTOKEN(LENGTH);}
 249 <EXPRESSION,BOTH,SCRIPT>"ALIGN"         { RTOKEN(ALIGN_K);}
 250 <EXPRESSION,BOTH,SCRIPT>"DATA_SEGMENT_ALIGN"    { RTOKEN(DATA_SEGMENT_ALIGN);}
 251 <EXPRESSION,BOTH,SCRIPT>"DATA_SEGMENT_RELRO_END"        { RTOKEN(DATA_SEGMENT_RELRO_END);}
 252 <EXPRESSION,BOTH,SCRIPT>"DATA_SEGMENT_END"      { RTOKEN(DATA_SEGMENT_END);}
 253 <EXPRESSION,BOTH,SCRIPT>"ADDR"          { RTOKEN(ADDR);}
 254 <EXPRESSION,BOTH,SCRIPT>"LOADADDR"      { RTOKEN(LOADADDR);}
 255 <EXPRESSION,BOTH,SCRIPT>"ALIGNOF"       { RTOKEN(ALIGNOF); }
 256 <EXPRESSION,BOTH>"MAX"                  { RTOKEN(MAX_K); }
 257 <EXPRESSION,BOTH>"MIN"                  { RTOKEN(MIN_K); }
 258 <EXPRESSION,BOTH,SCRIPT>"ASSERT"        { RTOKEN(ASSERT_K); }
 259 <BOTH,SCRIPT>"ENTRY"                    { RTOKEN(ENTRY);}
 260 <BOTH,SCRIPT,MRI>"EXTERN"               { RTOKEN(EXTERN);}
 261 <EXPRESSION,BOTH,SCRIPT>"NEXT"          { RTOKEN(NEXT);}
 262 <EXPRESSION,BOTH,SCRIPT>"sizeof_headers"        { RTOKEN(SIZEOF_HEADERS);}
 263 <EXPRESSION,BOTH,SCRIPT>"SIZEOF_HEADERS"        { RTOKEN(SIZEOF_HEADERS);}
 264 <EXPRESSION,BOTH,SCRIPT>"SEGMENT_START" { RTOKEN(SEGMENT_START);}
 265 <BOTH,SCRIPT>"MAP"                      { RTOKEN(MAP);}
 266 <EXPRESSION,BOTH,SCRIPT>"SIZEOF"        { RTOKEN(SIZEOF);}
 267 <BOTH,SCRIPT>"TARGET"                   { RTOKEN(TARGET_K);}
 268 <BOTH,SCRIPT>"SEARCH_DIR"               { RTOKEN(SEARCH_DIR);}
 269 <BOTH,SCRIPT>"OUTPUT"                   { RTOKEN(OUTPUT);}
 270 <BOTH,SCRIPT>"INPUT"                    { RTOKEN(INPUT);}
 271 <EXPRESSION,BOTH,SCRIPT>"GROUP"         { RTOKEN(GROUP);}
 272 <EXPRESSION,BOTH,SCRIPT>"AS_NEEDED"     { RTOKEN(AS_NEEDED);}
 273 <EXPRESSION,BOTH,SCRIPT>"DEFINED"       { RTOKEN(DEFINED);}
 274 <BOTH,SCRIPT>"CREATE_OBJECT_SYMBOLS"    { RTOKEN(CREATE_OBJECT_SYMBOLS);}
 275 <BOTH,SCRIPT>"CONSTRUCTORS"             { RTOKEN( CONSTRUCTORS);}
 276 <BOTH,SCRIPT>"FORCE_COMMON_ALLOCATION"  { RTOKEN(FORCE_COMMON_ALLOCATION);}
 277 <BOTH,SCRIPT>"INHIBIT_COMMON_ALLOCATION" { RTOKEN(INHIBIT_COMMON_ALLOCATION);}
 278 <BOTH,SCRIPT>"SECTIONS"                 { RTOKEN(SECTIONS);}
 279 <BOTH,SCRIPT>"INSERT"                   { RTOKEN(INSERT_K);}
 280 <BOTH,SCRIPT>"AFTER"                    { RTOKEN(AFTER);}
 281 <BOTH,SCRIPT>"BEFORE"                   { RTOKEN(BEFORE);}
 282 <BOTH,SCRIPT>"FILL"                     { RTOKEN(FILL);}
 283 <BOTH,SCRIPT>"STARTUP"                  { RTOKEN(STARTUP);}
 284 <BOTH,SCRIPT>"OUTPUT_FORMAT"            { RTOKEN(OUTPUT_FORMAT);}
 285 <BOTH,SCRIPT>"OUTPUT_ARCH"              { RTOKEN( OUTPUT_ARCH);}
 286 <BOTH,SCRIPT>"HLL"                      { RTOKEN(HLL);}
 287 <BOTH,SCRIPT>"SYSLIB"                   { RTOKEN(SYSLIB);}
 288 <BOTH,SCRIPT>"FLOAT"                    { RTOKEN(FLOAT);}
 289 <BOTH,SCRIPT>"QUAD"                     { RTOKEN( QUAD);}
 290 <BOTH,SCRIPT>"SQUAD"                    { RTOKEN( SQUAD);}
 291 <BOTH,SCRIPT>"LONG"                     { RTOKEN( LONG);}
 292 <BOTH,SCRIPT>"SHORT"                    { RTOKEN( SHORT);}
 293 <BOTH,SCRIPT>"BYTE"                     { RTOKEN( BYTE);}
 294 <BOTH,SCRIPT>"NOFLOAT"                  { RTOKEN(NOFLOAT);}
 295 <EXPRESSION,BOTH,SCRIPT>"NOCROSSREFS"   { RTOKEN(NOCROSSREFS);}
 296 <BOTH,SCRIPT>"OVERLAY"                  { RTOKEN(OVERLAY); }
 297 <BOTH,SCRIPT>"SORT_BY_NAME"             { RTOKEN(SORT_BY_NAME); }
 298 <BOTH,SCRIPT>"SORT_BY_ALIGNMENT"        { RTOKEN(SORT_BY_ALIGNMENT); }
 299 <BOTH,SCRIPT>"SORT"                     { RTOKEN(SORT_BY_NAME); }
 300 <EXPRESSION,BOTH,SCRIPT>"NOLOAD"        { RTOKEN(NOLOAD);}
 301 <EXPRESSION,BOTH,SCRIPT>"DSECT"         { RTOKEN(DSECT);}
 302 <EXPRESSION,BOTH,SCRIPT>"COPY"          { RTOKEN(COPY);}
 303 <EXPRESSION,BOTH,SCRIPT>"INFO"          { RTOKEN(INFO);}
 304 <EXPRESSION,BOTH,SCRIPT>"OVERLAY"       { RTOKEN(OVERLAY);}
 305 <EXPRESSION,BOTH,SCRIPT>"ONLY_IF_RO"    { RTOKEN(ONLY_IF_RO); }
 306 <EXPRESSION,BOTH,SCRIPT>"ONLY_IF_RW"    { RTOKEN(ONLY_IF_RW); }
 307 <EXPRESSION,BOTH,SCRIPT>"SPECIAL"       { RTOKEN(SPECIAL); }
 308 <BOTH,SCRIPT>"o"                        { RTOKEN(ORIGIN);}
 309 <BOTH,SCRIPT>"org"                      { RTOKEN(ORIGIN);}
 310 <BOTH,SCRIPT>"l"                        { RTOKEN( LENGTH);}
 311 <BOTH,SCRIPT>"len"                      { RTOKEN( LENGTH);}
 312 <EXPRESSION,BOTH,SCRIPT>"INCLUDE"       { RTOKEN(INCLUDE);}
 313 <BOTH,SCRIPT>"PHDRS"                    { RTOKEN (PHDRS); }
 314 <EXPRESSION,BOTH,SCRIPT>"AT"            { RTOKEN(AT);}
 315 <EXPRESSION,BOTH,SCRIPT>"SUBALIGN"      { RTOKEN(SUBALIGN);}
 316 <EXPRESSION,BOTH,SCRIPT>"PROVIDE"       { RTOKEN(PROVIDE); }
 317 <EXPRESSION,BOTH,SCRIPT>"PROVIDE_HIDDEN" { RTOKEN(PROVIDE_HIDDEN); }
 318 <EXPRESSION,BOTH,SCRIPT>"KEEP"          { RTOKEN(KEEP); }
 319 <EXPRESSION,BOTH,SCRIPT>"EXCLUDE_FILE"  { RTOKEN(EXCLUDE_FILE); }
 320 <EXPRESSION,BOTH,SCRIPT>"CONSTANT"      { RTOKEN(CONSTANT);}
 321 <MRI>"#".*\n?                   { ++ lineno; }
 322 <MRI>"\n"                       { ++ lineno;  RTOKEN(NEWLINE); }
 323 <MRI>"*".*                      { /* Mri comment line */ }
 324 <MRI>";".*                      { /* Mri comment line */ }
 325 <MRI>"END"                      { RTOKEN(ENDWORD); }
 326 <MRI>"ALIGNMOD"                 { RTOKEN(ALIGNMOD);}
 327 <MRI>"ALIGN"                    { RTOKEN(ALIGN_K);}
 328 <MRI>"CHIP"                     { RTOKEN(CHIP); }
 329 <MRI>"BASE"                     { RTOKEN(BASE); }
 330 <MRI>"ALIAS"                    { RTOKEN(ALIAS); }
 331 <MRI>"TRUNCATE"                 { RTOKEN(TRUNCATE); }
 332 <MRI>"LOAD"                     { RTOKEN(LOAD); }
 333 <MRI>"PUBLIC"                   { RTOKEN(PUBLIC); }
 334 <MRI>"ORDER"                    { RTOKEN(ORDER); }
 335 <MRI>"NAME"                     { RTOKEN(NAMEWORD); }
 336 <MRI>"FORMAT"                   { RTOKEN(FORMAT); }
 337 <MRI>"CASE"                     { RTOKEN(CASE); }
 338 <MRI>"START"                    { RTOKEN(START); }
 339 <MRI>"LIST".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
 340 <MRI>"SECT"                     { RTOKEN(SECT); }
 341 <EXPRESSION,BOTH,SCRIPT,MRI>"ABSOLUTE"                  { RTOKEN(ABSOLUTE); }
 342 <MRI>"end"                      { RTOKEN(ENDWORD); }
 343 <MRI>"alignmod"                 { RTOKEN(ALIGNMOD);}
 344 <MRI>"align"                    { RTOKEN(ALIGN_K);}
 345 <MRI>"chip"                     { RTOKEN(CHIP); }
 346 <MRI>"base"                     { RTOKEN(BASE); }
 347 <MRI>"alias"                    { RTOKEN(ALIAS); }
 348 <MRI>"truncate"                 { RTOKEN(TRUNCATE); }
 349 <MRI>"load"                     { RTOKEN(LOAD); }
 350 <MRI>"public"                   { RTOKEN(PUBLIC); }
 351 <MRI>"order"                    { RTOKEN(ORDER); }
 352 <MRI>"name"                     { RTOKEN(NAMEWORD); }
 353 <MRI>"format"                   { RTOKEN(FORMAT); }
 354 <MRI>"case"                     { RTOKEN(CASE); }
 355 <MRI>"extern"                   { RTOKEN(EXTERN); }
 356 <MRI>"start"                    { RTOKEN(START); }
 357 <MRI>"list".*                   { RTOKEN(LIST); /* LIST and ignore to end of line */ }
 358 <MRI>"sect"                     { RTOKEN(SECT); }
 359 <EXPRESSION,BOTH,SCRIPT,MRI>"absolute"                  { RTOKEN(ABSOLUTE); }
 360
 361 <MRI>{FILENAMECHAR1}{NOCFILENAMECHAR}*  {
 362 /* Filename without commas, needed to parse mri stuff */
 363                                  yylval.name = xstrdup (yytext);
 364                                   return NAME;
 365                                 }
 366
 367
 368 <BOTH>{FILENAMECHAR1}{FILENAMECHAR}*    {
 369                                  yylval.name = xstrdup (yytext);
 370                                   return NAME;
 371                                 }
 372 <BOTH>"-l"{FILENAMECHAR}+ {
 373                                   yylval.name = xstrdup (yytext + 2);
 374                                   return LNAME;
 375                                 }
 376 <EXPRESSION>{FILENAMECHAR1}{NOCFILENAMECHAR}*   {
 377                                  yylval.name = xstrdup (yytext);
 378                                   return NAME;
 379                                 }
 380 <EXPRESSION>"-l"{NOCFILENAMECHAR}+ {
 381                                   yylval.name = xstrdup (yytext + 2);
 382                                   return LNAME;
 383                                 }
 384 <SCRIPT>{WILDCHAR}* {
 385                 /* Annoyingly, this pattern can match comments, and we have
 386                    longest match issues to consider.  So if the first two
 387                    characters are a comment opening, put the input back and
 388                    try again.  */
 389                 if (yytext[0] == '/' && yytext[1] == '*')
 390                   {
 391                     yyless (2);
 392                     comment ();
 393                   }
 394                 else
 395                   {
 396                     yylval.name = xstrdup (yytext);
 397                     return NAME;
 398                   }
 399         }
 400
 401 <EXPRESSION,BOTH,SCRIPT,VERS_NODE>"\""[^\"]*"\"" {
 402                                         /* No matter the state, quotes
 403                                            give what's inside */
 404                                         yylval.name = xstrdup (yytext + 1);
 405                                         yylval.name[yyleng - 2] = 0;
 406                                         return NAME;
 407                                 }
 408 <BOTH,SCRIPT,EXPRESSION>"\n"            { lineno++;}
 409 <MRI,BOTH,SCRIPT,EXPRESSION>[ \t\r]+    { }
 410
 411 <VERS_NODE,VERS_SCRIPT>[:,;]    { return *yytext; }
 412
 413 <VERS_NODE>global               { RTOKEN(GLOBAL); }
 414
 415 <VERS_NODE>local                { RTOKEN(LOCAL); }
 416
 417 <VERS_NODE>extern               { RTOKEN(EXTERN); }
 418
 419 <VERS_NODE>{V_IDENTIFIER}       { yylval.name = xstrdup (yytext);
 420                                   return VERS_IDENTIFIER; }
 421
 422 <VERS_SCRIPT>{V_TAG}            { yylval.name = xstrdup (yytext);
 423                                   return VERS_TAG; }
 424
 425 <VERS_START>"{"                 { BEGIN(VERS_SCRIPT); return *yytext; }
 426
 427 <VERS_SCRIPT>"{"                { BEGIN(VERS_NODE);
 428                                   vers_node_nesting = 0;
 429                                   return *yytext;
 430                                 }
 431 <VERS_SCRIPT>"}"                { return *yytext; }
 432 <VERS_NODE>"{"                  { vers_node_nesting++; return *yytext; }
 433 <VERS_NODE>"}"                  { if (--vers_node_nesting < 0)
 434                                     BEGIN(VERS_SCRIPT);
 435                                   return *yytext;
 436                                 }
 437
 438 <VERS_START,VERS_NODE,VERS_SCRIPT>[\n]          { lineno++; }
 439
 440 <VERS_START,VERS_NODE,VERS_SCRIPT>#.*           { /* Eat up comments */ }
 441
 442 <VERS_START,VERS_NODE,VERS_SCRIPT>[ \t\r]+      { /* Eat up whitespace */ }
 443
 444 <<EOF>> {
 445   include_stack_ptr--;
 446
 447   if (include_stack_ptr == 0)
 448   {
 449     yyterminate ();
 450   }
 451   else
 452   {
 453     yy_switch_to_buffer (include_stack[include_stack_ptr]);
 454   }
 455
 456   ldfile_input_filename = file_name_stack[include_stack_ptr - 1];
 457   lineno = lineno_stack[include_stack_ptr];
 458
 459   return END;
 460 }
 461
 462 <SCRIPT,MRI,VERS_START,VERS_SCRIPT,VERS_NODE>.  lex_warn_invalid (" in script", yytext);
 463 <EXPRESSION,DEFSYMEXP,BOTH>.    lex_warn_invalid (" in expression", yytext);
 464
 465 %%
 466 \f
 467
 468 /* Switch flex to reading script file NAME, open on FILE,
 469    saving the current input info on the include stack.  */
 470
 471 void
 472 lex_push_file (FILE *file, const char *name)
 473 {
 474   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
 475     {
 476       einfo ("%F:includes nested too deeply\n");
 477     }
 478   file_name_stack[include_stack_ptr] = name;
 479   lineno_stack[include_stack_ptr] = lineno;
 480   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
 481
 482   include_stack_ptr++;
 483   lineno = 1;
 484   yyin = file;
 485   yy_switch_to_buffer (yy_create_buffer (yyin, YY_BUF_SIZE));
 486 }
 487
 488 /* Return a newly created flex input buffer containing STRING,
 489    which is SIZE bytes long.  */
 490
 491 static YY_BUFFER_STATE
 492 yy_create_string_buffer (const char *string, size_t size)
 493 {
 494   YY_BUFFER_STATE b;
 495
 496   /* Calls to m-alloc get turned by sed into xm-alloc.  */
 497   b = malloc (sizeof (struct yy_buffer_state));
 498   b->yy_input_file = 0;
 499   b->yy_buf_size = size;
 500
 501   /* yy_ch_buf has to be 2 characters longer than the size given because
 502      we need to put in 2 end-of-buffer characters.  */
 503   b->yy_ch_buf = malloc ((unsigned) (b->yy_buf_size + 3));
 504
 505   b->yy_ch_buf[0] = '\n';
 506   strcpy (b->yy_ch_buf+1, string);
 507   b->yy_ch_buf[size+1] = YY_END_OF_BUFFER_CHAR;
 508   b->yy_ch_buf[size+2] = YY_END_OF_BUFFER_CHAR;
 509   b->yy_n_chars = size+1;
 510   b->yy_buf_pos = &b->yy_ch_buf[1];
 511
 512   b->yy_is_our_buffer = 1;
 513   b->yy_is_interactive = 0;
 514   b->yy_at_bol = 1;
 515   b->yy_fill_buffer = 0;
 516
 517   /* flex 2.4.7 changed the interface.  FIXME: We should not be using
 518      a flex internal interface in the first place!  */
 519 #ifdef YY_BUFFER_NEW
 520   b->yy_buffer_status = YY_BUFFER_NEW;
 521 #else
 522   b->yy_eof_status = EOF_NOT_SEEN;
 523 #endif
 524
 525   return b;
 526 }
 527
 528 /* Switch flex to reading from STRING, saving the current input info
 529    on the include stack.  */
 530
 531 void
 532 lex_redirect (const char *string)
 533 {
 534   YY_BUFFER_STATE tmp;
 535
 536   yy_init = 0;
 537   if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
 538     {
 539       einfo("%F: macros nested too deeply\n");
 540     }
 541   file_name_stack[include_stack_ptr] = "redirect";
 542   lineno_stack[include_stack_ptr] = lineno;
 543   include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
 544   include_stack_ptr++;
 545   lineno = 1;
 546   tmp = yy_create_string_buffer (string, strlen (string));
 547   yy_switch_to_buffer (tmp);
 548 }
 549 \f
 550 /* Functions to switch to a different flex start condition,
 551    saving the current start condition on `state_stack'.  */
 552
 553 static int state_stack[MAX_INCLUDE_DEPTH * 2];
 554 static int *state_stack_p = state_stack;
 555
 556 void
 557 ldlex_script (void)
 558 {
 559   *(state_stack_p)++ = yy_start;
 560   BEGIN (SCRIPT);
 561 }
 562
 563 void
 564 ldlex_mri_script (void)
 565 {
 566   *(state_stack_p)++ = yy_start;
 567   BEGIN (MRI);
 568 }
 569
 570 void
 571 ldlex_version_script (void)
 572 {
 573   *(state_stack_p)++ = yy_start;
 574   BEGIN (VERS_START);
 575 }
 576
 577 void
 578 ldlex_version_file (void)
 579 {
 580   *(state_stack_p)++ = yy_start;
 581   BEGIN (VERS_SCRIPT);
 582 }
 583
 584 void
 585 ldlex_defsym (void)
 586 {
 587   *(state_stack_p)++ = yy_start;
 588   BEGIN (DEFSYMEXP);
 589 }
 590
 591 void
 592 ldlex_expression (void)
 593 {
 594   *(state_stack_p)++ = yy_start;
 595   BEGIN (EXPRESSION);
 596 }
 597
 598 void
 599 ldlex_both (void)
 600 {
 601   *(state_stack_p)++ = yy_start;
 602   BEGIN (BOTH);
 603 }
 604
 605 void
 606 ldlex_popstate (void)
 607 {
 608   yy_start = *(--state_stack_p);
 609 }
 610 \f
 611
 612 /* Place up to MAX_SIZE characters in BUF and return
 613    either the number of characters read, or 0 to indicate EOF.  */
 614
 615 static int
 616 yy_input (char *buf, int max_size)
 617 {
 618   int result = 0;
 619   if (YY_CURRENT_BUFFER->yy_input_file)
 620     {
 621       if (yyin)
 622         {
 623           result = fread (buf, 1, max_size, yyin);
 624           if (result < max_size && ferror (yyin))
 625             einfo ("%F%P: read in flex scanner failed\n");
 626         }
 627     }
 628   return result;
 629 }
 630
 631 /* Eat the rest of a C-style comment.  */
 632
 633 static void
 634 comment (void)
 635 {
 636   int c;
 637
 638   while (1)
 639   {
 640     c = input();
 641     while (c != '*' && c != EOF)
 642     {
 643       if (c == '\n')
 644         lineno++;
 645       c = input();
 646     }
 647
 648     if (c == '*')
 649     {
 650       c = input();
 651       while (c == '*')
 652        c = input();
 653       if (c == '/')
 654        break;                   /* found the end */
 655     }
 656
 657     if (c == '\n')
 658       lineno++;
 659
 660     if (c == EOF)
 661     {
 662       einfo( "%F%P: EOF in comment\n");
 663       break;
 664     }
 665   }
 666 }
 667
 668 /* Warn the user about a garbage character WHAT in the input
 669    in context WHERE.  */
 670
 671 static void
 672 lex_warn_invalid (char *where, char *what)
 673 {
 674   char buf[5];
 675
 676   /* If we have found an input file whose format we do not recognize,
 677      and we are therefore treating it as a linker script, and we find
 678      an invalid character, then most likely this is a real object file
 679      of some different format.  Treat it as such.  */
 680   if (ldfile_assumed_script)
 681     {
 682       bfd_set_error (bfd_error_file_not_recognized);
 683       einfo ("%F%s: file not recognized: %E\n", ldfile_input_filename);
 684     }
 685
 686   if (! ISPRINT (*what))
 687     {
 688       sprintf (buf, "\\%03o", (unsigned int) *what);
 689       what = buf;
 690     }
 691
 692   einfo ("%P:%S: ignoring invalid character `%s'%s\n", what, where);
 693 }